diff --git a/db/migrations/1690296539500_add-user-constraints.js b/db/migrations/1690296539500_add-user-constraints.js
new file mode 100644
index 00000000..d95d1862
--- /dev/null
+++ b/db/migrations/1690296539500_add-user-constraints.js
@@ -0,0 +1,40 @@
+/* eslint-disable no-unused-vars */
+
+/**
+ * Defines changes to be made to the database schema to accommodate new functionality.
+ *
+ * See {@link https://salsita.github.io/node-pg-migrate/#/migrations?id=defining-migrations the docs}.
+ *
+ * @param {MigrationBuilder} pgm
+ * @returns {void | Promise<void>}
+ */
+exports.up = (pgm) => {
+	pgm.alterColumn("users", "name", { notNull: true });
+	pgm.alterColumn("users", "github_id", { notNull: true });
+	pgm.addConstraint("users", "unique_github_ids", { unique: ["github_id"] });
+};
+
+/**
+ * Reverses the "up" migration to return the database to its initial state.
+ *
+ * @param {MigrationBuilder} pgm
+ * @returns {void | Promise<void>}
+ */
+exports.down = (pgm) => {
+	pgm.dropConstraint("users", "unique_github_ids");
+	pgm.alterColumn("users", "github_id", { notNull: false });
+	pgm.alterColumn("users", "name", { notNull: false });
+};
+
+/**
+ * Create new shorthand column definitions for this and any future migrations.
+ *
+ * @type {ColumnDefinitions | undefined}
+ */
+exports.shorthands = undefined;
+
+/**
+ * Importing library types for less verbose type hints.
+ * @typedef {import("node-pg-migrate").MigrationBuilder} MigrationBuilder
+ * @typedef {import("node-pg-migrate").ColumnDefinitions} ColumnDefinitions
+ */