Frontend for Token generation/usage

[AndreasPB]

We need the UI for generating and using a token

[codecov-commenter]

Codecov Report

Merging #26 (79f2a07) into master (afb59e1) will increase coverage by 7.08%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #26      +/-   ##
==========================================
+ Coverage   80.41%   87.50%   +7.08%     
==========================================
  Files          26        6      -20     
  Lines         960       96     -864     
  Branches       13       23      +10     
==========================================
- Hits          772       84     -688     
+ Misses        186       10     -176     
  Partials        2        2              

Impacted Files	Coverage Δ
...nd/src/components/lecturer-attendance-table.svelte	100.00% <100.00%> (ø)
...ontend/src/components/success-error-message.svelte	100.00% <100.00%> (ø)
backend/app/db/crud.py
backend/app/db/psql_models.py
backend/app/db/psql_test_data.py
backend/app/main.py
backend/app/routers/attendance.py
backend/app/routers/lesson.py
backend/app/db/redis.py
backend/app/routers/course.py
... and 13 more

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