feature: Human User Creation Endpoint

[multipletwigs]

Description of the pull request

Changes made

New Features

• Added in an endpoint, /users that allows for the creation of a human user with User role.
• The endpoint returns a token for that particular human user as part of its response.
• Added in a guard for the endpoint, requiring the CREATE_USER permission with valid tokens.
• Added in appropriate returnValues.ts consisting of success and failure statuses and messages.
• Added in some more user metadata, such as collecting email and name information.

Chores

• When configuring for UpStash, added in TLS support in redisConfig. No configurations done yet.

Related issues

#10

Testings done

Added Tests

• Test for creating a user and ensuring it is saved in RedisDB.
• Test for guards, including authorised and non-authorised flows
• Test that this user can create threads, and can create messages in their own thread
• Added in utils for creating human users

Screenshots (if any)

POST-ing to this endpoint creates a user in redis (explorer on upstash)

Checklist

• I have written tests
• My code does not produce new errors
• I gave myself a code review before asking others.

[GuiBibeau]

This is solid and follows patterns!