Fix more bugs originating from changes to api

client/src/App.test.tsx

client/src/__mocks__/axios.js

client/src/actions/user.ts

client/src/interfaces/Competition.ts

client/src/interfaces/Role.ts

client/src/pages/admin/components/AddCompetition.tsx

...nt/src/pages/admin/components/CompetitionManager.test.tsx

client/src/pages/admin/components/CompetitionManager.tsx

client/src/reducers/userReducer.ts

client/src/utils/checkAuthentication.ts