Provider Login Form (UI)

[brammerl]

Create the form that a Provider fills out in order to log in to the site

Acceptance Criteria:

• Upon clicking "log in", the provider is able to enter their username/email (TODO: clarify which, it should only require one or the other) and password into two corresponding, labeled text fields
• Submit button correctly sends data to the back end to ensure auth
• [Possibly a stretch goal/optional] Upon successful auth check, the provider is redirected to the correct "logged-in" home page