# UpdateUserRequest Updates explicitly present profile fields. Empty username or displayName clears that optional field; an omitted field remains unchanged. `Goodmem.Client.Models.UpdateUserRequest` - `DisplayName` (`string?`): Replacement display name. An empty string clears the display name. JSON: `displayName`. - `Email` (`string?`): Replacement email. A present empty value is invalid. JSON: `email`. - `MergeLabels` (`IReadOnlyDictionary?`): Labels to upsert; must contain at least one entry and is mutually exclusive with replaceLabels. The final stored map may contain at most 20 entries; keys and values contain at most 255 characters; keys use [a-z0-9._-]. JSON: `mergeLabels`. - `ReplaceLabels` (`IReadOnlyDictionary?`): Complete replacement label map; an empty map clears all labels and is mutually exclusive with mergeLabels. At most 20 entries; keys and values contain at most 255 characters; keys use [a-z0-9._-]. JSON: `replaceLabels`. - `Username` (`string?`): Replacement username. An empty string clears the username. JSON: `username`. [.NET](../../dotnet.md)