`werkzeug.routing.BuildError`

[GregHilston]

When attempting to log in for the first time, after registering and giving Fitbit permissions:

  File "/Users/ghilston/.virtualenvs/fitbit/lib/python3.6/site-packages/flask/app.py", line 1625, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Users/ghilston/.virtualenvs/fitbit/lib/python3.6/site-packages/flask_login.py", line 791, in decorated_view
    return current_app.login_manager.unauthorized()
  File "/Users/ghilston/.virtualenvs/fitbit/lib/python3.6/site-packages/flask_login.py", line 224, in unauthorized
    return redirect(login_url(login_view, request.url))
  File "/Users/ghilston/.virtualenvs/fitbit/lib/python3.6/site-packages/flask_login.py", line 640, in login_url
    base = url_for(login_view)
  File "/Users/ghilston/.virtualenvs/fitbit/lib/python3.6/site-packages/flask/helpers.py", line 332, in url_for
    return appctx.app.handle_url_build_error(error, endpoint, values)
  File "/Users/ghilston/.virtualenvs/fitbit/lib/python3.6/site-packages/flask/app.py", line 1811, in handle_url_build_error
    reraise(exc_type, exc_value, tb)
  File "/Users/ghilston/.virtualenvs/fitbit/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/Users/ghilston/.virtualenvs/fitbit/lib/python3.6/site-packages/flask/helpers.py", line 322, in url_for
    force_external=external)
  File "/Users/ghilston/.virtualenvs/fitbit/lib/python3.6/site-packages/werkzeug/routing.py", line 1758, in build
    raise BuildError(endpoint, values, method, self)
werkzeug.routing.BuildError: Could not build url for endpoint 'auth.login'. Did you mean 'main.login' instead?

[GregHilston]

Performing the same operations a second time worked, meaning I got a refresh_token and a access_token in the db