Trouble logging in – Lomotif: Edit Video. Add Music Review

For the past 2 weeks I been trying to sign in on my Lomotif and it keeps saying “ my username ‘is not an existing account. Please check and try again.” And I know my Lomotif is right but I don’t understand why I can’t log in. This is the first time in a while since I had trouble but now I can’t even log in.
Review by audrey? on Lomotif: Edit Video. Add Music.