Login in my app....it's something working well and something not working

[Anjum_Parween]

I am loging in my app …it’s working fine sometimes after logging out if I want to log in again it’s not working…again after sometime it’s started working by its own…
I didn’t understand why it’s happening…
I m using firebase realtime database for loging and sign up…
Please help

[Gaston (zodiaclogic)]

upload your blocks

[Anjum_Parween]

Here are my log in blocks: