Create a custom authentication class for all API Views

[Vaibhav-22-dm]

Expected Behavior:

• Custom authentication should extract token from authorization headers and check its expiry time.
• If token is expired then send error message that token has expired with proper status code.
• If token is invalid then send error message that token is invalid with proper status code.
• If token is valid and not expired then user should be returned by fetching it using phone number decoded from token.
• This authentication class should be added to all protected api views.