Oauth2 provider and initial api

rowers/permissions.py

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+from rest_framework import permissions
+from rowers.models import Rower
+
+class IsOwnerOrReadOnly(permissions.BasePermission):
+    """
+    Custom permission to only allow owners of an object to edit it.
+    """
+
+    def has_object_permission(self, request, view, obj):
+        # Read permissions are allowed to any request,
+        # so we'll always allow GET, HEAD or OPTIONS requests.
+        if request.method in permissions.SAFE_METHODS:
+            return True
+
+        # Write permissions are only allowed to the owner of the snippet.
+        return obj.owner == request.user
+
+class IsOwnerOrNot(permissions.BasePermission):
+    def has_object_permission(self, request, view, obj):
+        r = Rower.objects.get(user=request.user)
+        return (obj.user == r)