App that has credentials stored in a database and only those credentials can be used to login

[TIMAI2]

Here is a guide:

Spreadsheet component. Example. Google Sheets

In order to utilize this component, one must first have a Google Developer Account. Then, one must create a new project under that Google Developer Account, enable the Google Sheets API on that project, and finally create a Service Account for the Sheets API. How to create the Service Account, here: http://ai2.appinventor.mit.edu/reference/other/googlesheets-api-setup.html At the end of the whole process we will obtain a file of the form: app-inventor-338017-8c72fd465555.json We must upload…