add refresh tokens

api/src/Data/AppDbContext.cs

@@ -12,5 +12,6 @@ public class AppDbContext : IdentityDbContext<User> {
 
     // Db set for each model besides Users (DbSet<template> is already defined in IdenityDbContext<template>)
     public DbSet<Item> Items { get; set; }
+    public DbSet<RefreshToken> RefreshTokens { get; set; }
 
 }