fix: дубликат username теперь дает 500

server/internal/store/contacts.go

@@ -4,8 +4,8 @@ import (
 	"context"
 	"errors"
 
-	"github.com/jackc/pgx/v5/pgconn"
 	"github.com/jackc/pgerrcode"
+	"github.com/jackc/pgx/v5/pgconn"
 )
 
 // AddContact creates a contact relation or returns ErrDuplicate if it exists.

server/internal/store/sessions.go

@@ -5,9 +5,9 @@ import (
 	"errors"
 	"time"
 
-	"github.com/jackc/pgx/v5/pgconn"
 	"github.com/jackc/pgerrcode"
 	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
 )
 
 // CreateSession adds a new session record.

server/internal/store/users.go

@@ -4,9 +4,9 @@ import (
 	"context"
 	"errors"
 
-	"github.com/jackc/pgx/v5/pgconn"
 	"github.com/jackc/pgerrcode"
 	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
 )
 
 // CreateUser inserts a new user returning the created record or ErrDuplicate on conflict.