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# Change authentication field keys
## Change scenario
You want to change the key of one or more [authentication input fields](/integrations/build/basicauth#1-build-an-input-form) required when a user authenticates your app to Zapier.
## Impact to users
This is a **breaking change**.
Modifying the key of an existing authentication field constitutes a breaking change. Without adequate precautions, existing app connections may break as [migration](/integrations/manage/migrate) is not possible. Users will need to establish a new connection to your integration and manually refresh each of their Zaps.
## Best practices
We strongly encourage you to **avoid changing authentication field keys** whenever possible.
### Workaround
If your API endpoint requires a different property for authentication, think about adjusting the property key rather than amending the form field input's key. This modification must be made in each trigger, action, search request, as well as in the authentication.
> NOTE: Form field input keys do not need to match directly with the properties your API expects.
For example, let's say you have a form field input with the key `API-KEY`and are sending the field's value to your API using the same property name of `API-KEY`.
```bash theme={null}
headers: {
"API-KEY": bundle.authData.api_key; // original
}
```
Next, your API changes and expects the request property to be `X-API-KEY` instead. You can change the request property key (left) as needed. But still refer to the original form field input (right).
```bash theme={null}
headers: {
"X-API-KEY": bundle.authData.api_key; // new - request key and field key can differ
}
```
***
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