“Invalid validator function: unique” shows up even though I register as a new user

This is my code

User.init({
    email: {
      type: DataTypes.STRING,
      validate: {
        isEmail: {
          args: true,
          msg: "Invalid email format"
        },
        notEmpty: {
          args: true,  
          msg: 'Cannot be blank'
        },
        unique: {
          args: true,
          msg: "Email must be unique"
        }
      },
    }

I check using Postman. I register as a new user but the “Invalid validator function: unique” shows up instead of being registered.