Auth

[Matthias-Schaub]

• load_config() now definied in definitions.py. Import CONFIG dict from definitions.
• Removed unused function (init_firebase()). This is allready covered in firebaseDB().
• Remove try-except statements where 'raise' is used in except-block. If nothing except of a print statement is done in the except-black and the error is raised, try except is not needed.
• Black and flake8