client-api: Add From impls for UserIdentifier

crates/ruma-client-api/CHANGELOG.md

@@ -1,5 +1,9 @@
 # [unreleased]
 
+Improvements:
+
+* Add `From<&UserId>` and `From<&OwnedUserId>` implementations for `UserIdentifier`
+
 # 0.14.0
 
 Bug fixes:

crates/ruma-client-api/src/uiaa.rs

@@ -12,7 +12,7 @@ use ruma_common::{
     },
     serde::{from_raw_json_value, Incoming, JsonObject, StringEnum},
     thirdparty::Medium,
-    ClientSecret, OwnedSessionId,
+    ClientSecret, OwnedSessionId, OwnedUserId, UserId,
 };
 use serde::{
     de::{self, DeserializeOwned},
@@ -590,6 +590,18 @@ pub enum UserIdentifier<'a> {
     },
 }
 
+impl<'a> From<&'a UserId> for UserIdentifier<'a> {
+    fn from(id: &'a UserId) -> Self {
+        Self::UserIdOrLocalpart(id.as_str())
+    }
+}
+
+impl<'a> From<&'a OwnedUserId> for UserIdentifier<'a> {
+    fn from(id: &'a OwnedUserId) -> Self {
+        Self::UserIdOrLocalpart(id.as_str())
+    }
+}
+
 impl IncomingUserIdentifier {
     pub(crate) fn to_outgoing(&self) -> UserIdentifier<'_> {
         match self {