Feat/76 user database

[jb3rndt]

Closes #76

Changes made by this Pull Request

• Introduces a Database for storing users
• For integration tests, a test database is created and every test is run in a separate transaction that is rolled back after the test
• also includes routes for creating users and requesting a user by email (which is unique)

Definition of Done

• [x] Tests are written and run successful
• [x] Code is documented
• [x] User Manual is updated
• [x] All requirements of the user story are met

[codecov-commenter]

Codecov Report

Merging #81 (d999743) into dev (1b43e9c) will decrease coverage by 2.14%. The diff coverage is 94.53%.

@@            Coverage Diff             @@
##              dev      #81      +/-   ##
==========================================
- Coverage   99.43%   97.29%   -2.15%     
==========================================
  Files           9       15       +6     
  Lines         178      296     +118     
==========================================
+ Hits          177      288     +111     
- Misses          1        8       +7     

Impacted Files	Coverage Δ
api/mod/src/models/task.py	100.00% <ø> (ø)
api/mod/alembic/env.py	79.16% <79.16%> (ø)
api/mod/src/database/database.py	80.00% <80.00%> (ø)
api/mod/alembic/versions/be60cc3fc1d3_.py	100.00% <100.00%> (ø)
api/mod/src/app.py	100.00% <100.00%> (ø)
api/mod/src/database/db_models.py	100.00% <100.00%> (ø)
api/mod/src/models/annotation.py	100.00% <100.00%> (ø)
api/mod/src/models/login.py	100.00% <100.00%> (ø)
api/mod/src/models/user.py	100.00% <100.00%> (ø)
api/mod/src/routers/login.py	100.00% <100.00%> (ø)
... and 2 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 1b43e9c...d999743. Read the comment docs.