add legacy_username user field

Author: Puyodead1

assets/openapi.json

@@ -1354,6 +1354,9 @@
                     "global_name": {
                         "type": "string"
                     },
+                    "legacy_username": {
+                        "type": "string"
+                    },
                     "discriminator": {
                         "type": "string"
                     },
@@ -3479,6 +3482,9 @@
                     "global_name": {
                         "type": "string"
                     },
+                    "legacy_username": {
+                        "type": "string"
+                    },
                     "discriminator": {
                         "type": "string"
                     },
@@ -6950,6 +6956,9 @@
                     "global_name": {
                         "type": "string"
                     },
+                    "legacy_username": {
+                        "type": "string"
+                    },
                     "discriminator": {
                         "type": "string"
                     },
@@ -7070,6 +7079,9 @@
                     "global_name": {
                         "type": "string"
                     },
+                    "legacy_username": {
+                        "type": "string"
+                    },
                     "discriminator": {
                         "type": "string"
                     },