Perhaps it's silly but this has been a long standing question in my mind. When talking about entering one's username and password into a form and submitting it, is the correct form to 'login to' or to 'log into'? Now it's time to answer that question.

According to dictionary.com, login can be used as a verb and would be synonymous to 'log on'. This indicates that either form is technically correct, though I do see the hyphenated form log-in there to add a little confusion. Anyhow, I think that the question is effectively answered that it's the writer's choice. Let's just stay consistent.

For reference, the AP style manual reads:

login, logon, logoff (n.) But use as two words in verb form: I log in to my computer.