Login Page for GUI

Currently an API key must be acquired from the Imperial Aeronautics Data Store (AE Datastore) before use of NekUpload. For the GUI, an interactive login may be more familiar to users. Although undocumented on the InvenioRDM REST API documentation (AE Datastore is built upon InvenioRDM), there is an API call /login. Judicious use of AI may be necessary to acquire the documentation for this endpoint.