removed current user middleware usage

.gitignore

src/account/serializers.py

src/common/email.py

src/document/migrations/0007_auto_20200204_1442.py

src/document/models.py

src/document/serializers.py

src/document/views.py

src/homework/migrations/0004_auto_20200204_1457.py

src/homework/models.py

src/homework/serializers.py

src/homework/views.py

src/mentors/migrations/0002_auto_20200204_1500.py

src/mentors/models.py

src/mentors/urls.py

src/mentors/views.py

src/news/migrations/0003_auto_20200204_1510.py

src/news/models.py

src/news/views.py

src/stats/migrations/0004_auto_20200204_1510.py

src/stats/models.py