Unable to login to my minecraft account even after password is resetted

After opening the minecraft launcher and getting into the game, the minecraft just suddenly produce a black screen and crashed. Once restarted, it prompt me to relog my details into the minecraft launcher, however, the account details I've typed in didn't register. It says that " login failed. Invalid username or password" 

Afterwards I tried to change the password, and once I did, went back to the official mojang page to relog. Sadly, it still says invalid password...

Therefore, would u mind if you can help me solve this problem issue with my account? Thanks