actually add the file

migration/src/m20220928_015108_concurrency_limits.rs

@@ -0,0 +1,58 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        // add a field to the UserKeys table
+        manager
+            .alter_table(
+                sea_query::Table::alter()
+                    .table(UserKeys::Table)
+                    // add column for a better version of rate limiting
+                    .add_column(
+                        ColumnDef::new(UserKeys::MaxConcurrentRequests)
+                            .big_unsigned()
+                            .null()
+                            .default(200),
+                    )
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        // put the UserKeys back to how it was before our migrations
+        manager
+            .alter_table(
+                sea_query::Table::alter()
+                    .table(UserKeys::Table)
+                    .to_owned()
+                    .drop_column(UserKeys::MaxConcurrentRequests)
+                    .to_owned(),
+            )
+            .await
+    }
+}
+
+// copied from *_log_reverts.rs, but added new columns
+#[derive(Iden)]
+pub enum UserKeys {
+    Table,
+    // we don't touch some of the columns
+    // Id,
+    // UserId,
+    // ApiKey,
+    // Description,
+    // PrivateTxs,
+    // Active,
+    // RequestsPerMinute,
+    // LogRevertChance,
+    // AllowedIps,
+    // AllowedOrigins,
+    // AllowedReferers,
+    // AllowedUserAgents,
+    MaxConcurrentRequests,
+}