refactor: infer types from zod validation

utils/contactConfig.ts

@@ -1,18 +1,19 @@
 import {
   ContactConfig,
-  ContactConfigField,
   ContactFieldGroups,
 } from "@/types/requests/contactConfig"
 
 export function getValueFromContactConfig(
-  keyStrings: ContactConfigField,
+  keyString: string,
   data: ContactConfig
 ): string | undefined {
-  const [groupName, key] = keyStrings.split(".") as [
+  const [groupName, key] = keyString.split(".") as [
     ContactFieldGroups,
     keyof ContactConfig[ContactFieldGroups],
   ]
-  const fieldGroup = data[groupName]
+  if (data[groupName]) {
+    const fieldGroup = data[groupName]
 
-  return fieldGroup[key]
+    return fieldGroup[key]
+  }
 }