There could be different situations when you are not able to access MetaMask, its features, or the wallet account that you have created on it. For MetaMask login, it is essential that the browser extension works properly, the internet connectivity on your device is alright, and the login credentials you are feeding are correct. So, if you wish to sign in to your MetaMask account without a hurdle, you can definitely verify all of this before trying out any other solution.