***TextgridAuth:** Do not return None, but raise an exception if wrong SID ([`88ecb8f`](https://gitlab.gwdg.de/dariah-de/textgridrep/textgrid-python-clients/-/commit/88ecb8f3f4385b2a238c9d4c2988203652b493f9))
### Documentation
***TextgridAuth:** Return type List of list_assigned_projects is not optional anymore ([`46ce851`](https://gitlab.gwdg.de/dariah-de/textgridrep/textgrid-python-clients/-/commit/46ce851b3998f096343067f1e9f2bc2d3e5eee9d))
***TextgridAuth:** Correct error message thrown in case of errors listing assigned projects ([`ca4fa0c`](https://gitlab.gwdg.de/dariah-de/textgridrep/textgrid-python-clients/-/commit/ca4fa0c9b9f40656ec806d4d8ab2bc394e0a3678))
* Pypi badge from shields.io ([`09d4cc5`](https://gitlab.gwdg.de/dariah-de/textgridrep/textgrid-python-clients/-/commit/09d4cc5b30330df90cfa253a5acb62fb8ff8666e))