usr: HTTP x-msg-usr entity-header

Set or return the user properties.

Type	Description
HTTP header name	x-msg-usr
HTTP header type	Entity-header
Valid in HTTP request message	POST, x-msg-require-headers
Allowed values	See Syntax ; for example, x-msg-usr: myProp1;5;i1, x-msg-usr: myProp2;"My String";string
Default value	Not applicable

When set on an HTTP POST request, set the request message user properties.
On an HTTP GET or DELETE request, the x-msg-usr header is ignored.
Specified in x-msg-require-headers, sets x-msg-usr in the HTTP response message to user properties of a message.
Multiple properties can be set on a message. Specify multiple comma-separated properties in a single x-msg-usr header, or by using two or more separate instances of the x-msg-usr header.
We can request a specific property to be returned in the response to a GET or DELETE request. Specify the name of the property in the x-msg-require-headers header of the request, using the prefix usr-. For example,
```
x-msg-require-headers: usr-myProp1
```
To request that all user properties are returned in a response, use the ALL-USR constant. For example,
```
x-msg-require-headers: ALL-USR
```