title: ImportError: Could not import 'rest_framework_simplejwt.authentication.JWTAuthentication'
body: <p>I am trying to deploy a django app on GCP but when i try to make migrations it gives me this error:</p>
  
  <blockquote>
    <p>ImportError: Could not import
    'rest_framework_simplejwt.authentication.JWTAuthentication' for API
    setting 'DEFAULT_AUTHENTICATION_CLASSES'. ModuleNotFoundError: No
    module named 'rest_framework_simplejwt'.</p>
  </blockquote>
  
  <p><strong>Settings.py</strong></p>
  
  <pre><code>REST_FRAMEWORK = {
      'DEFAULT_AUTHENTICATION_CLASSES': [
          'rest_framework_simplejwt.authentication.JWTAuthentication',
      ],
      'DEFAULT_PERMISSION_CLASSES': [
          'rest_framework.permissions.IsAuthenticated'
      ],
  'DEFAULT_RENDERER_CLASSES': [
          'rest_framework.renderers.JSONRenderer',
          'rest_framework.renderers.BrowsableAPIRenderer',
      ]
  }
  
  SIMPLE_JWT = {
      'ALGORITHM': 'HS256',
      'SIGNING_KEY': SECRET_KEY,
      'VERIFYING_KEY': None,
  'ACCESS_TOKEN_LIFETIME': timedelta(minutes=800),
      'REFRESH_TOKEN_LIFETIME': timedelta(days=2),
  }
  OAUTH2_PROVIDER = {
          'ACCESS_TOKEN_EXPIRE_SECONDS': 60 * 15,
          'OAUTH_SINGLE_ACCESS_TOKEN': True,
          'OAUTH_DELETE_EXPIRED': True
   }
  </code></pre>
  
  <p><strong>requirements.txt</strong></p>
  
  <pre><code>django-cors-headers
  pyjwt
  djangorestframework
  djangorestframework-jwt==1.11.0
  </code></pre>
  
  <p>What is it that I am missing ?</p>
  
  <p><strong>UPDATE</strong>
  I installed rest_framework_simplejwt and now the error shifted to :</p>
  
  <blockquote>
    <p>No module named 'rest_framework_simplejwt.tokens'</p>
  </blockquote>