[V7] GetSelf panic

### Context
```
idt, err := identityClient.GetSelf(ctx, identity.GetSelfArgs{})
	if err != nil {
		return nil, err
	}
```

### Waited behavior:
Return a correct non nil `IdentitySelf` or an error. 

### Current behavior:
`Panic runtime error: invalid memory address or nil pointer dereference`