diff --git a/src/apps/api/serializers/leaderboards.py b/src/apps/api/serializers/leaderboards.py
index 444425861..75834f7da 100644
--- a/src/apps/api/serializers/leaderboards.py
+++ b/src/apps/api/serializers/leaderboards.py
@@ -24,6 +24,7 @@ class Meta:
             'sorting',
             'index',
             'hidden',
+            'precision',
         )
 
     def validate(self, attrs):
diff --git a/src/apps/api/views/competitions.py b/src/apps/api/views/competitions.py
index fde3aedf9..342e237ce 100644
--- a/src/apps/api/views/competitions.py
+++ b/src/apps/api/views/competitions.py
@@ -482,8 +482,21 @@ def get_leaderboard(self, request, pk):
                     'organization': submission['organization'],
                 })
             for score in submission['scores']:
+
+                # default precision is set to 2
+                precision = 2
+
+                # loop over columns to find a column with the same index
+                # replace default precision with column precision
+                for col in columns:
+                    if col["index"] == score["index"]:
+                        precision = col["precision"]
+                        break
+
                 tempScore = score
                 tempScore['task_id'] = submission['task']
+                # round the score to 'precision' decimal points
+                tempScore['score'] = str(round(float(tempScore["score"]), precision))
                 response['submissions'][submissions_keys[submission_key]]['scores'].append(tempScore)
 
         for task in query['tasks']:
diff --git a/src/apps/competitions/migrations/0031_auto_20230504_1016.py b/src/apps/competitions/migrations/0031_auto_20230504_1016.py
new file mode 100644
index 000000000..7b645906c
--- /dev/null
+++ b/src/apps/competitions/migrations/0031_auto_20230504_1016.py
@@ -0,0 +1,18 @@
+# Generated by Django 2.2.17 on 2023-05-04 10:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('competitions', '0030_submission_started_when'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='competition',
+            name='docker_image',
+            field=models.CharField(default='codalab/codalab-legacy:py37', max_length=128),
+        ),
+    ]
diff --git a/src/apps/competitions/tests/test_v15_unpacker.py b/src/apps/competitions/tests/test_v15_unpacker.py
index 24ac3137f..cc5aabc96 100644
--- a/src/apps/competitions/tests/test_v15_unpacker.py
+++ b/src/apps/competitions/tests/test_v15_unpacker.py
@@ -34,4 +34,4 @@ def test_page_unpacking(self):
 
     def test_leaderboard_unpacking(self):
         self.unpacker._unpack_leaderboards()
-        assert self.unpacker.competition['leaderboards'] == test_data.LEADERBOARDS
+        assert self.unpacker.competition['leaderboards'] == test_data.V1_LEADERBOARDS
diff --git a/src/apps/competitions/tests/test_v2_unpacker.py b/src/apps/competitions/tests/test_v2_unpacker.py
index 8aa64a7b3..28d269212 100644
--- a/src/apps/competitions/tests/test_v2_unpacker.py
+++ b/src/apps/competitions/tests/test_v2_unpacker.py
@@ -37,7 +37,7 @@ def test_page_unpacking(self):
 
     def test_leaderboard_unpacking(self):
         self.unpacker._unpack_leaderboards()
-        assert self.unpacker.competition['leaderboards'] == test_data.LEADERBOARDS
+        assert self.unpacker.competition['leaderboards'] == test_data.V2_LEADERBOARDS
 
     def test_competition_type_if_not_set(self):
         assert self.unpacker.competition['competition_type'] == 'competition'
diff --git a/src/apps/competitions/tests/unpacker_test_data.py b/src/apps/competitions/tests/unpacker_test_data.py
index 5172e261b..5b6f4cf97 100644
--- a/src/apps/competitions/tests/unpacker_test_data.py
+++ b/src/apps/competitions/tests/unpacker_test_data.py
@@ -143,7 +143,28 @@
 # Truth Data
 # -------------------------------------------------
 
-LEADERBOARDS = [{
+V1_LEADERBOARDS = [{
+    "title": "Results",
+    "key": "Results",
+    "columns": [
+        {
+            "title": "prediction_score",
+            "key": "prediction_score",
+            "index": 0,
+            "sorting": "desc",
+            "precision": 4,
+        },
+        {
+            "title": "Duration",
+            "key": "Duration",
+            "index": 1,
+            "sorting": "desc",
+            "precision": 2,
+        }
+    ]
+}]
+
+V2_LEADERBOARDS = [{
     "title": "Results",
     "key": "Results",
     "columns": [
diff --git a/src/apps/competitions/unpackers/v1.py b/src/apps/competitions/unpackers/v1.py
index 897f6be02..8afe291be 100644
--- a/src/apps/competitions/unpackers/v1.py
+++ b/src/apps/competitions/unpackers/v1.py
@@ -158,7 +158,9 @@ def _unpack_leaderboards(self):
                 'title': column['title'],
                 'key': column['title'],
                 'index': index,
-                'sorting': column.get('sort') or 'desc'
+                'sorting': column.get('sort') or 'desc',
+                # get precision as numeric_format, if not found, use default value = 2
+                'precision': column.get('numeric_format', 2)
             }
 
             for leaderboard_data in self.competition['leaderboards']:
diff --git a/src/apps/competitions/views.py b/src/apps/competitions/views.py
index 7a4045f7f..8d3e46720 100644
--- a/src/apps/competitions/views.py
+++ b/src/apps/competitions/views.py
@@ -2,7 +2,7 @@
 from django.http import Http404
 from django.views.generic import TemplateView, DetailView
 
-from .models import Competition
+from .models import Competition, CompetitionParticipant
 
 
 class CompetitionManagement(LoginRequiredMixin, TemplateView):
@@ -29,8 +29,12 @@ def get_object(self, *args, **kwargs):
         competition = super().get_object(*args, **kwargs)
         is_creator = self.request.user.is_superuser or self.request.user == competition.created_by
         is_collaborator = self.request.user in competition.collaborators.all()
+
+        # get participants from CompetitionParticipant where user=user and competition=competition
+        is_participant = CompetitionParticipant.objects.filter(user=self.request.user, competition=competition).count() > 0
+
         valid_secret_key = self.request.GET.get('secret_key') == str(competition.secret_key)
-        if is_creator or is_collaborator or competition.published or valid_secret_key:
+        if is_creator or is_collaborator or competition.published or valid_secret_key or is_participant:
             return competition
         raise Http404()
 
diff --git a/src/apps/leaderboards/migrations/0008_column_precision.py b/src/apps/leaderboards/migrations/0008_column_precision.py
new file mode 100644
index 000000000..e09e0fbb8
--- /dev/null
+++ b/src/apps/leaderboards/migrations/0008_column_precision.py
@@ -0,0 +1,18 @@
+# Generated by Django 2.2.17 on 2023-05-04 10:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('leaderboards', '0007_auto_20201110_1731'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='column',
+            name='precision',
+            field=models.IntegerField(default=2),
+        ),
+    ]
diff --git a/src/apps/leaderboards/models.py b/src/apps/leaderboards/models.py
index 00dcf0248..4c9eda5a2 100644
--- a/src/apps/leaderboards/models.py
+++ b/src/apps/leaderboards/models.py
@@ -62,6 +62,7 @@ class Column(models.Model):
     index = models.PositiveIntegerField()
     leaderboard = models.ForeignKey(Leaderboard, on_delete=models.CASCADE, related_name="columns")
     hidden = models.BooleanField(default=False)
+    precision = models.IntegerField(default=2)
 
     class Meta:
         unique_together = ('leaderboard', 'key')
diff --git a/src/apps/profiles/backends.py b/src/apps/profiles/backends.py
new file mode 100644
index 000000000..dd5cdd502
--- /dev/null
+++ b/src/apps/profiles/backends.py
@@ -0,0 +1,24 @@
+from django.contrib.auth.backends import ModelBackend
+from django.core.exceptions import ObjectDoesNotExist
+from django.contrib.auth import get_user_model
+
+User = get_user_model()
+
+
+class EmailAuthenticationBackend(ModelBackend):
+    def authenticate(self, request, username=None, password=None, **kwargs):
+        try:
+            user = User.objects.get(email=username)
+            if user.check_password(password):
+                return user
+            else:
+                return None
+        except ObjectDoesNotExist:
+            return None
+
+    def get_user(self, user_id):
+        try:
+            user = User.objects.get(id=user_id)
+            return user
+        except ObjectDoesNotExist:
+            return None
diff --git a/src/apps/profiles/forms.py b/src/apps/profiles/forms.py
index ba75c6a55..7b4ad71e8 100644
--- a/src/apps/profiles/forms.py
+++ b/src/apps/profiles/forms.py
@@ -27,3 +27,9 @@ class Meta:
 
         model = User
         fields = ("username", "email", "password1", "password2")
+
+
+class LoginForm(forms.Form):
+
+    username = forms.CharField(max_length=150)
+    password = forms.CharField(max_length=150, widget=forms.PasswordInput)
diff --git a/src/apps/profiles/urls_accounts.py b/src/apps/profiles/urls_accounts.py
index 86321d24e..03acf8254 100644
--- a/src/apps/profiles/urls_accounts.py
+++ b/src/apps/profiles/urls_accounts.py
@@ -7,9 +7,10 @@
 
 urlpatterns = [
     url(r'^signup', views.sign_up, name="signup"),
+    path('login/', views.log_in, name='login'),
     # url(r'^user_profile', views.user_profile, name="user_profile"),
     # path('login/', auth_views.LoginView.as_view(extra_context=extra_context), name='login'),
-    path('login/', views.LoginView.as_view(), name='login'),
+    # path('login/', views.LoginView.as_view(), name='login'),
     # path('logout/', auth_views.LogoutView.as_view(), name='logout'),
     path('logout/', views.LogoutView.as_view(), name='logout'),
     path('password_reset/', views.CustomPasswordResetView.as_view(), name='password_reset'),
diff --git a/src/apps/profiles/views.py b/src/apps/profiles/views.py
index fe02bdee9..8abbf94b2 100644
--- a/src/apps/profiles/views.py
+++ b/src/apps/profiles/views.py
@@ -3,7 +3,7 @@
 
 from django.conf import settings
 from django.contrib import messages
-from django.contrib.auth import authenticate
+from django.contrib.auth import authenticate, login
 from django.contrib.sites.shortcuts import get_current_site
 from django.core.mail import EmailMessage, EmailMultiAlternatives
 from django.http import Http404
@@ -18,7 +18,7 @@
 
 from api.serializers.profiles import UserSerializer, OrganizationDetailSerializer, OrganizationEditSerializer, \
     UserNotificationSerializer
-from .forms import SignUpForm
+from .forms import SignUpForm, LoginForm
 from .models import User, Organization, Membership
 from .tokens import account_activation_token
 
@@ -128,6 +128,33 @@ def sign_up(request):
     return render(request, 'registration/signup.html', context)
 
 
+def log_in(request):
+
+    context = {}
+    context['chahub_signup_url'] = "{}/profiles/signup?next={}/social/login/chahub".format(
+        settings.SOCIAL_AUTH_CHAHUB_BASE_URL,
+        settings.SITE_DOMAIN
+    )
+    if request.method == 'POST':
+        form = LoginForm(request.POST)
+
+        if form.is_valid():
+            username = form.cleaned_data.get('username')
+            password = form.cleaned_data.get('password')
+            user = authenticate(username=username, password=password)
+            if user:
+                login(request, user)
+                return redirect('pages:home')
+            else:
+                messages.error(request, "Wrong Credentials!")
+        else:
+            context['form'] = form
+
+    if not context.get('form'):
+        context['form'] = LoginForm()
+    return render(request, 'registration/login.html', context)
+
+
 # Password Reset views/forms below
 # auth_forms
 class CustomPasswordResetForm(auth_forms.PasswordResetForm):
diff --git a/src/settings/base.py b/src/settings/base.py
index 79e1d2381..64ab54589 100644
--- a/src/settings/base.py
+++ b/src/settings/base.py
@@ -117,6 +117,7 @@
     'utils.oauth_backends.ChahubOAuth2',
     'django.contrib.auth.backends.ModelBackend',
     'django_su.backends.SuBackend',
+    'profiles.backends.EmailAuthenticationBackend',
 )
 
 SOCIAL_AUTH_PIPELINE = (
diff --git a/src/static/riot/competitions/detail/_tabs.tag b/src/static/riot/competitions/detail/_tabs.tag
index 15a8246b3..719308664 100644
--- a/src/static/riot/competitions/detail/_tabs.tag
+++ b/src/static/riot/competitions/detail/_tabs.tag
@@ -280,6 +280,40 @@
                 })
             })
 
+            // loop over competition phases to mark if phase has started or ended
+            self.competition.phases.forEach(function (phase, index) {
+                
+                phase_ended = false 
+                phase_started = false
+
+                // check if phase has started
+                if((Date.parse(phase["start"]) - Date.parse(new Date())) > 0){
+                    // start date is in the future, phase started = NO
+                    phase_started = false
+                }else{
+                    // start date is not in the future, phase started = YES
+                    phase_started = true
+                }
+
+                if(phase_started){
+                    // check if end data exists for this phase
+                    if(phase["end"]){
+                        if((Date.parse(phase["end"]) - Date.parse(new Date())) < 0){
+                            // Phase cannote accept submissions if end date is in the past
+                            phase_ended = true
+                        }else{
+                            // Phase can accept submissions if end date is in the future
+                            phase_ended = false
+                        }
+                    }else{
+                        // Phase can accept submissions if end date is not given
+                        phase_ended = false
+                    }
+                }
+                self.competition.phases[index]["phase_ended"] = phase_ended
+                self.competition.phases[index]["phase_started"] = phase_started
+            })
+
             self.competition.is_admin = CODALAB.state.user.has_competition_admin_privileges(competition)
             self.selected_phase_index = _.get(_.find(self.competition.phases, {'status': 'Current'}), 'id')
             if (self.selected_phase_index == null) {
diff --git a/src/static/riot/competitions/detail/leaderboards.tag b/src/static/riot/competitions/detail/leaderboards.tag
index f23d59a01..6e476108f 100644
--- a/src/static/riot/competitions/detail/leaderboards.tag
+++ b/src/static/riot/competitions/detail/leaderboards.tag
@@ -57,7 +57,7 @@
             <td if="{submission.organization === null}"><a href="{submission.slug_url}">{ submission.owner }</a></td>
             <td if="{submission.organization !== null}"><a href="{submission.organization.url}">{ submission.organization.name }</a></td>
             <td each="{ column in filtered_columns }">{ get_score(column, submission) } </td>
-            <td if="{enable_detailed_results}"><a href="detailed_results/{submission.id}">Show detailed results</a></td>
+            <td if="{enable_detailed_results}"><a href="detailed_results/{submission.id}" target="_blank">Show detailed results</a></td>
         </tr>
         </tbody>
     </table>
@@ -121,8 +121,6 @@
             CODALAB.api.get_leaderboard_for_render(self.phase_id)
                 .done(responseData => {
                     self.selected_leaderboard = responseData
-
-                   
                     self.columns = []
                     // Make fake task and columns for Metadata so it can be filtered like columns
                     if(self.selected_leaderboard.fact_sheet_keys){
diff --git a/src/static/riot/competitions/detail/submission_upload.tag b/src/static/riot/competitions/detail/submission_upload.tag
index 4172bd78a..f1405cfb9 100644
--- a/src/static/riot/competitions/detail/submission_upload.tag
+++ b/src/static/riot/competitions/detail/submission_upload.tag
@@ -4,6 +4,8 @@
 
         <div class="submission-form">
             <h1>Submission upload</h1>
+            <div if="{_.get(selected_phase, 'phase_ended')}" class="ui red message">This phase has ended and no longer accepts submissions!</div>
+            <div if="{!_.get(selected_phase, 'phase_started')}" class="ui yellow message">This phase hasn't started yet!</div>
             <form class="ui form coda-animated {error: errors}" ref="form" enctype="multipart/form-data">
                 <div class="submission-form" ref="fact_sheet_form" if="{ opts.fact_sheet !== null}">
                     <h2>Metadata or Fact Sheet</h2>
@@ -349,17 +351,33 @@
         }
 
         self.check_can_upload = function () {
-            CODALAB.api.can_make_submissions(self.selected_phase.id)
-                .done(function (data) {
-                    if (data.can) {
-                        self.prepare_upload(self.upload)()
-                    } else {
-                        toastr.error(data.reason)
+            
+            // Check if selected phase accepts submissions (within the deadline of the phase)
+            if(self.selected_phase.phase_started && !self.selected_phase.phase_ended){
+
+                CODALAB.api.can_make_submissions(self.selected_phase.id)
+                    .done(function (data) {
+                        if (data.can) {
+                            self.prepare_upload(self.upload)()
+                        } else {
+                            toastr.error(data.reason)
+                        }
+                    })
+                    .fail(function (data) {
+                        toastr.error('Could not verify your ability to make a submission')
+                    })
+            }else{
+                // Error when phase is not accepting submissions
+                if(!self.selected_phase.phase_started){
+                    toastr.error('This phase has not started yet. Please check the phase start date!')
+                   
+                }else {
+                    if(self.selected_phase.phase_ended){
+                        toastr.error('This phase has ended and no longer accepts submissions!')
                     }
-                })
-                .fail(function (data) {
-                    toastr.error('Could not verify your ability to make a submission')
-                })
+                }
+                self.clear_form()
+            }
         }
 
         self.get_fact_sheet_answers = function () {
diff --git a/src/static/riot/competitions/editor/_leaderboard.tag b/src/static/riot/competitions/editor/_leaderboard.tag
index 6dad1fc7f..dce33e22b 100644
--- a/src/static/riot/competitions/editor/_leaderboard.tag
+++ b/src/static/riot/competitions/editor/_leaderboard.tag
@@ -179,6 +179,12 @@
                             <input selenium="column-key" type="text" class="ui field" name="column_key_{index}" value="{_.get(column, 'key')}" onchange="{ modal_updated }">
                         </td>
                     </tr>
+                    <tr>
+                        <td>Column Precision <span style="color: red;">*</span></td>
+                        <td each="{ column, index in columns || [] }">
+                            <input selenium="column-precision" type="number" class="ui field" name="column_precision_{index}" value="{_.get(column, 'precision') || 2}" min="1" max="10" onchange="{ modal_updated }">
+                        </td>
+                    </tr>
                     <tr>
                         <td>Hidden</td>
                         <td each="{ column, index in columns || [] }" style="text-align: center;">
@@ -392,6 +398,7 @@
                 id: data.id,
                 title: data.title,
                 key: data.key,
+                precision : (data.precision === undefined) ? 2 : data.precision ,
                 submission_rule: self.selected_submission_rule,
                 hidden: self.refs.hidden_leaderboard.checked,
                 primary_index: _.get($('input[name=primary_index]:checked').data(), 'index', 0),
@@ -400,6 +407,7 @@
                         index: i,
                         title: _.get(data, `title_${i}`),
                         key: _.get(data, `column_key_${i}`),
+                        precision: _.get(data, `column_precision_${i}`),
                         sorting: _.get(data, `sorting_${i}`),
                         hidden: self.refs[`hidden_${i}`].checked,
                     }
diff --git a/src/templates/registration/login.html b/src/templates/registration/login.html
index f4b802cb2..55d8f10cf 100644
--- a/src/templates/registration/login.html
+++ b/src/templates/registration/login.html
@@ -24,7 +24,7 @@ <h2 class="ui blue centered header">
                     <i class="user icon"></i>
                     <input type="text"
                            name="username"
-                           placeholder="username"
+                           placeholder="username or email"
                            id="id_username"
                            value="{{ form.username.value|default:''}}"
                            maxlength="{{ form.username.field.max_length }}"
diff --git a/src/tests/functional/test_competitions.py b/src/tests/functional/test_competitions.py
index 3db8bd355..7a1e2cc48 100644
--- a/src/tests/functional/test_competitions.py
+++ b/src/tests/functional/test_competitions.py
@@ -137,6 +137,7 @@ def test_manual_competition_creation(self):
         self.find('div[selenium="add-column"]').click()
         sleep(LONG_WAIT)
         self.find('input[selenium="column-key"]').send_keys('cOlUmN kEy')
+        self.find('input[selenium="column-precision"]').send_keys('cOlUmN pReCiSiOn')
         self.find('input[selenium="hidden"]').click()
         self.find('div[selenium="save3"]').click()
         sleep(LONG_WAIT)
diff --git a/src/tests/functional/test_files/competition.zip b/src/tests/functional/test_files/competition.zip
index ff2121d6a..005fba612 100644
Binary files a/src/tests/functional/test_files/competition.zip and b/src/tests/functional/test_files/competition.zip differ
diff --git a/src/tests/functional/test_files/competition_18.zip b/src/tests/functional/test_files/competition_18.zip
index e0ed2aeef..f5afa821d 100644
Binary files a/src/tests/functional/test_files/competition_18.zip and b/src/tests/functional/test_files/competition_18.zip differ
diff --git a/src/tests/functional/test_submissions.py b/src/tests/functional/test_submissions.py
index c34a89b1d..5bc11af8a 100644
--- a/src/tests/functional/test_submissions.py
+++ b/src/tests/functional/test_submissions.py
@@ -18,7 +18,7 @@ def setUp(self):
         super().setUp()
         self.user = UserFactory(password='test')
 
-    def _run_submission_and_add_to_leaderboard(self, competition_zip_path, submission_zip_path, expected_submission_output, has_solutions=True, timeout=600):
+    def _run_submission_and_add_to_leaderboard(self, competition_zip_path, submission_zip_path, expected_submission_output, has_solutions=True, timeout=600, precision=2):
         """Creates a competition and runs a submission inside it, waiting for expected output to
         appear in submission realtime output panel.
 
@@ -73,13 +73,13 @@ def _run_submission_and_add_to_leaderboard(self, competition_zip_path, submissio
 
         # The leaderboard table lists our submission
         prediction_score = Submission.objects.get(pk=submission_id).scores.first().score
-        assert Decimal(self.find('leaderboards table tbody tr:nth-of-type(1) td:nth-of-type(3)').text) == prediction_score
+        assert Decimal(self.find('leaderboards table tbody tr:nth-of-type(1) td:nth-of-type(3)').text) == round(Decimal(prediction_score), precision)
 
     def test_v15_iris_result_submission_end_to_end(self):
-        self._run_submission_and_add_to_leaderboard('competition_15_iris.zip', 'submission_15_iris_result.zip', '======= Set 1 (Iris_test)', has_solutions=False)
+        self._run_submission_and_add_to_leaderboard('competition_15_iris.zip', 'submission_15_iris_result.zip', '======= Set 1 (Iris_test)', has_solutions=False, precision=4)
 
     def test_v15_iris_code_submission_end_to_end(self):
-        self._run_submission_and_add_to_leaderboard('competition_15_iris.zip', 'submission_15_iris_code.zip', '======= Set 1 (Iris_test)', has_solutions=False)
+        self._run_submission_and_add_to_leaderboard('competition_15_iris.zip', 'submission_15_iris_code.zip', '======= Set 1 (Iris_test)', has_solutions=False, precision=4)
 
     def test_v18_submission_end_to_end(self):
         self._run_submission_and_add_to_leaderboard('competition_18.zip', 'submission_18.zip', 'results', has_solutions=False)