Output from some functions is not Json string but string containing Json

[mkudlej]

Example:
request.url: http://10.34.X:8080/api/v1/auth/login (similar for logout)
request.method: POST
response.content: "{'message': 'Logged in'}" <- this is parsed as string which contains {'message': 'Logged in'}

I expect that it will be like this:
response.content: {'message': 'Logged in'} <- this will be parsed to dictionary {'message': 'Logged in'}

Another function
request.url: http://10.34.X:8080/api/v1/users/test
request.method: GET
response.content: {"Username":"test","Email":"test@localhost","Role":"admin","Groups":[],"Type":0,"Status":true} <- this is correctly parsed to dictionary