Removing unique constraint from username column

src/common/database/sql.ts

@@ -1,7 +1,7 @@
 export const CREATE_TABLE_reservations = `
 CREATE TABLE IF NOT EXISTS reservations (
   id                VARCHAR(36) NOT NULL PRIMARY KEY,
-  username          VARCHAR(64) NOT NULL UNIQUE,
+  username          VARCHAR(64) NOT NULL,
   password          VARCHAR(255) NOT NULL,
   date_range_start  DATETIME NOT NULL,
   date_range_end    DATETIME NOT NULL,