Test/unit test for logout

[ayanahye]

Description:

Unit tests for the logout route.

Testing for Error

Should return an error with a status code and json message in the following cases:

• invalid token name
• invalid token type
• token became null
• invalid token made to look like a valid token

Testing for Success

Should return success status with a json message in the following cases:

• valid token name and type
• valid token sent with additional data