how step to make login?

Answer 1

It's really simple
# Download the sololearn app from playstore
# After installing, register yourself in the app giving ur necessary details.
# Then login to the app and it's DONE.. 😃

Answer 2

If I am understanding your question correctly in creating a username/password form, then refer to my public code listed here: https://code.sololearn.com/WNtucoN24yV1/#html