--Remember that you have to specify the values you want to return the method --
mutation{ createCustomer(variables: { name:"Dahiana Lopez", phone:"098123123", idCard:"1231234", city:"Aregua" }){ name }
}
mutation{ deleteCustomer(id:1) }
mutation{ updateCustomer(id:1,fields:{ name:"Dahia" }) }
query{ CustomerList{ name, phone, city } }
Validate //////////// -- Customer -- Doctor -- Procedure -- Supplies -- Diseasess