Implement API login functionality

[r0x0d]

Overview of the Solution:

With the login screen in progress / finalized, we need to implement an endpoint in the API to be able to login users. We also need to differentiate between administrator access and normal user access.

Examples (if relevant):

Blockers (if relevant):

#38
Sub Activities

• Add the endpoints for a login route
• Add the tests for this endpoint

[r0x0d]

We can change the sub activities of this issue according to the necessities of the activity.

[r0x0d]

@ch4rl1e5 There is an ongoing PR that can assist in this activity. #20