I logged into minecraft and it crashed on me

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here

What actually happened was...:
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. I logged into mineraft
3.and it just crashed on me it didn't let me log in it just crahsed please fix