feat(commands): command for creating a user

[prescottprue]

As mentioned in #14 by @fabiocarneiro there is a need for creating user's during tests:

I would like to have it like this:

cy.firebaseSignUp(email, password)
cy.firebaseSignIn(email, password)
other authentication options would also be interesting

Notes

• Documentation should clearly specify that password should be stored in the cypress environment only (preferably passed in by CLI flag or passed from the environment running cypress)

Open Questions

• Which other user auth methods need to be supported?
• Is this best practice? Running a number of tests will cause the amount of users to build up over time - it is better practice to clean up after completing tests

[fabiocarneiro]

Although I also think in the direction passwords should not be in the code, I tend to think preventing this is not so much responsibility of the library (warnings are fine). I suggest to focus in two directions:

• Help the library users to obtain one or multiple account data in a convenient way. Single env variable can be quite cumbersome with large userbase.
• Allowing accounts to be easily created, either with defined usernames/passwords or with pattern/randomly created credentials.

[prescottprue]

Something of note: Just using a UID that doesn't already exist creates the user if you are using cy.login since it is generating a custom auth token through firebase-admin which does this automatically.

Does that handle your case @fabiocarneiro? I would like to avoid directly advocating for creating new users in tests since it would require cleanup - this would add tons and tons of new accounts even after of a short time of having tests run as part of a CI flow where builds/tests are run regularly

[btjones]

@prescottprue for my use case, I'm using the email returned from an authenticated session to do something in my app. I could likely rewrite my app logic to grab the email in another way but having this built into cypress-firebase would be a nice addition.

By the way, thanks for all of your work on cypress-firebase!

[damienromito]

cy.deleteUser() would be the most usefull because when I test the account creation, I need to manually delete the user in the firebase authentification emulator