Fix OAuth signup with collection description

oauth.go

@@ -99,7 +99,7 @@ type OAuthDatastore interface {
 	ValidateOAuthState(context.Context, string) (string, string, int64, string, error)
 	GenerateOAuthState(context.Context, string, string, int64, string) (string, error)
 
-	CreateUser(*config.Config, *User, string) error
+	CreateUser(*config.Config, *User, string, string) error
 	GetUserByID(int64) (*User, error)
 }
 

oauth_signup.go

@@ -127,7 +127,7 @@ func (h oauthHandler) viewOauthSignup(app *App, w http.ResponseWriter, r *http.R
 		displayName = r.FormValue(oauthParamUsername)
 	}
 
-	err = h.DB.CreateUser(h.Config, newUser, displayName)
+	err = h.DB.CreateUser(h.Config, newUser, displayName, "")
 	if err != nil {
 		return h.showOauthSignupPage(app, w, r, tp, err)
 	}

oauth_test.go

@@ -110,7 +110,7 @@ func (m *MockOAuthDatastore) GetIDForRemoteUser(ctx context.Context, remoteUserI
 	return -1, nil
 }
 
-func (m *MockOAuthDatastore) CreateUser(cfg *config.Config, u *User, username string) error {
+func (m *MockOAuthDatastore) CreateUser(cfg *config.Config, u *User, username, description string) error {
 	if m.DoCreateUser != nil {
 		return m.DoCreateUser(cfg, u, username)
 	}