You can sign in with a Google or SoundCloud account instead of a password. Manage this under Settings → Account → Security → Login Methods.
Linking one
Select Link next to Google or SoundCloud and complete the sign-in. Both can be linked at once.
After that, either appears as an option on the login screen under or continue with.
Why link one
One less password. Nothing to remember or reset.
A route back in. If you lose access to your password, a linked account is another way in — no reset email needed.
SoundCloud specifically is worth linking if you'll import mixes. One connection covers signing in and mix syncing. See Importing Mixes From SoundCloud.
What it doesn't change
Linking a sign-in method doesn't change your account email, your notifications, or anything about your profile. It's an additional door into the same account.
Your email address stays your primary identifier.
Which account to link
One you'll keep long-term and control. Linking a work Google account you'd lose if you changed jobs, or an old SoundCloud you no longer have the password for, defeats the point.
Signing up this way
If you signed up with Google or SoundCloud in the first place, you may not have a password at all. Setting one from Settings → Account → Security gives you a second route in, which is worth doing.
Keeping the account secure
A linked account is only as secure as the account it links to. If your Google account isn't protected with two-factor authentication, that's now the weakest point in your DJfindr security too.
Unlinking
Manage links from the same Login Methods section. Make sure you have another way in before you remove one — a password set, or the other provider linked.