When you're making a user account for the first time, or are logging into that account, you might find a note somewhere around the password field that explicitly says the password is case sensitive, in which case it does matter how you enter the letter cases to log in.
Mgbe ị na-eme akaụntụ nke onye ọrụ maka oge mbụ, ma ọ bụ na-abanye n'ime akaụntụ ahụ, ịnwere ike ịchọta ederede ebe na mpaghara paswọọdụ nke kwupụtara n'ụzọ doro anya na paswọọdụ bụ ihe akpọrọ ihe, na nke ikpe ọ dị mkpa ka i si tinye leta ahụ ikpe ịbanye.