diff --git a/src/main/java/com/penguineering/gartenplus/auth/GithubOidcUserService.java b/src/main/java/com/penguineering/gartenplus/auth/GithubOidcUserService.java
index 09a2af1..b3b4bd9 100644
--- a/src/main/java/com/penguineering/gartenplus/auth/GithubOidcUserService.java
+++ b/src/main/java/com/penguineering/gartenplus/auth/GithubOidcUserService.java
@@ -70,7 +70,7 @@ private UserDTO createUser(OAuth2User origin) {
         final String origin_id = Optional.ofNullable(origin.getAttribute("id"))
                 .map(Object::toString)
                 .orElseThrow(() -> new IllegalArgumentException("id attribute is missing"));
-        final String origin_name = origin.getAttribute("name");
+        final String origin_name = determineDisplayName(origin);
         final String origin_email = origin.getAttribute("email");
         final String origin_avatar_url = origin.getAttribute("avatar_url");
 
@@ -92,7 +92,7 @@ private UserDTO createUser(OAuth2User origin) {
     }
 
     private UserEntity updateUserFromOIDC(OAuth2User origin, UserEntity user) {
-        final String origin_name = origin.getAttribute("name");
+        final String origin_name = determineDisplayName(origin);
         final String origin_email = origin.getAttribute("email");
         final String origin_avatar_url = origin.getAttribute("avatar_url");
 
@@ -105,4 +105,11 @@ private UserEntity updateUserFromOIDC(OAuth2User origin, UserEntity user) {
 
         return userEntityService.save(user);
     }
+
+    private String determineDisplayName(OAuth2User origin) {
+        return Optional.ofNullable(origin.getAttribute("name"))
+                .or(() -> Optional.ofNullable(origin.getAttribute("login")))
+                .map(String::valueOf)
+                .orElseThrow(() -> new IllegalArgumentException("Name and login attribute are missing"));
+    }
 }
diff --git a/src/main/java/com/penguineering/gartenplus/auth/user/UserDTO.java b/src/main/java/com/penguineering/gartenplus/auth/user/UserDTO.java
index 5024c24..c29bc2e 100644
--- a/src/main/java/com/penguineering/gartenplus/auth/user/UserDTO.java
+++ b/src/main/java/com/penguineering/gartenplus/auth/user/UserDTO.java
@@ -17,10 +17,6 @@ public record UserDTO(
         @JsonProperty("email") String email,
         @JsonProperty("avatar_url") URI avatarUrl) {
 
-    public UserDTO {
-        Objects.requireNonNull(displayName, "displayName must not be null");
-    }
-
     @Override
     public String toString() {
         return displayName + "(" + id + ")";