[Solved]-Error decoding signature in Django Rest Framework

The best thing I can suggest to you is not to implement the JWT logic by yourself. Please use the package dj_rest_auth or if you only need the JWT logic, use SimpleJWT. The dj_rest_auth package provides you with full-featured functionalities for authentication and authorization. It also uses SimpleJWT by default as its backend for JWT implementation and functionalities.

Links:

https://dj-rest-auth.readthedocs.io/en/latest/

https://django-rest-framework-simplejwt.readthedocs.io/en/latest/