If you had signed up with Google or Facebook account since there’s no password information linked with the account, you cannot sign in manually. Sign in to Send Anywhere via Facebook or Google.
However, if you set a password, you can sign in manually.
How to set a password:
1. Go to Account page of settings after sign in your account.
2. Click 'Edit' button(pencil image) next to the Password.
3. Set a password and click 'Save'.