False positive on 'Bearer'

[Segelzwerg]

Describe the bug

We have an access token class, that wraps a token string and it's type.

class AccessToken(BaseModel):
    """
    Wrapper of the access token.
    """
    token: str
    token_type: str

For the moment we only support Bearer type. Creating a token with a hard coded type raises hard coded password.

Test results:
>> Issue: [B106:hardcoded_password_funcarg] Possible hardcoded password: 'Bearer'
   Severity: Low   Confidence: Medium
   CWE: CWE-259 (https://cwe.mitre.org/data/definitions/259.html)
   Location: whist/server/api/user/auth.py:38:11
   More Info: https://bandit.readthedocs.io/en/1.7.3/plugins/b106_hardcoded_password_funcarg.html
37	    token = create_access_token(token_request)
38	    return AccessToken(token=token, token_type='Bearer')

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Code scanned:
	Total lines of code: 9[25](https://github.com/Whist-Team/Whist-Server/runs/5397490348?check_suite_focus=true#step:5:25)
	Total lines skipped (#nosec): 0
	Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
	Total issues (by severity):
		Undefined: 0
		Low: 1
		Medium: 0
		High: 0
	Total issues (by confidence):
		Undefined: 0
		Low: 0
		Medium: 1
		High: 0
Files skipped (0):

Reproduction steps

1. create a token from the above class with `AccessToken(token=token, token_type='Bearer')` where `token` is the actual token string.

Expected behavior

I my opinion this should not be raised as it is a token type not and a password.

Bandit version

1.7.3 (Default)

Python version

3.10 (Default)

Additional context

This has also been reproduced with Python 3.9.