Hi @rubythedog689dng0, welcome to Thunkable! 
Be sure to check out our posts about How to ask Great Questions v2.0 and our Community Guidelines as you get started.
We would need a bit more information here to help you. Are you receiving an error when trying to use these sign in blocks? Is there an issue with the connection to Firebase? If you can offer a bit more information, we should be able to help you get this working!
Thank you!