Function resolveCredentials

resolveCredentials<T extends Record<string, unknown>>(
    requestCredentials: Partial<T>,
    envCredentials: Partial<T>,
    fieldNames: (keyof T)[],
    disableFallback: boolean,
): CredentialResolutionResult<Partial<T>>
Resolves multiple credential fields at once, tracking the source of each value.
Type Parameters
- T extends Record<string, unknown>
Parameters
- requestCredentials: Partial<T>
  Credentials provided in the request
- envCredentials: Partial<T>
  Credentials from environment variables
- fieldNames: (keyof T)[]
  Array of field names to resolve
- disableFallback: boolean
  If true, don't use environment values
Returns CredentialResolutionResult<Partial<T>>
Resolution result with values and source tracking
Example
```
const result = resolveCredentials(
    credentials,
    { tenantId: process.env.AZURE_TENANT_ID, clientId: process.env.AZURE_CLIENT_ID },
    ['tenantId', 'clientId', 'clientSecret'],
    credentials?.disableEnvironmentFallback ?? false
);

console.log(result.source); // 'mixed' if some from request, some from env
console.log(result.fieldSources); // { tenantId: 'request', clientId: 'environment', ... }
```
- Defined in Communication/base-types/src/CredentialUtils.ts:185