“I followed all the steps from the Firebase authentication tutorial available online, but right at the end, it asked for the ‘sign in’ block — and in my case, I only had the ‘sign up’ block.” Can someone help me figure this out?
Hi @thaisantunescarvalho, welcome to Thunkable! 
Since you don’t see the sing in function, you will need to create it first:
Be sure to check out How to ask Great Questions v2.0, the Community Guidelines, and our Getting Started Guide to make the best of your Thunkable Community experience!
thank you!!