Get User Property

Returns the property corresponding to `key` for a user. For more informationabout user properties, see [Confluence entity properties](https://developer.atlassian.com/cloud/confluence/confluence-entity-properties/).`Note`, these properties stored against a user are on a Confluence site level and not space/content level.**[Permissions](https://confluence.atlassian.com/x/_AozKw) required**:Permission to access the Confluence site ('Can use' global permission).