Lookup system user via email instead of username

Author: rowanseymour

Diff for: backends/rapidpro/schema.sql

@@ -1,7 +1,7 @@
 DROP TABLE IF EXISTS users_user CASCADE;
 CREATE TABLE users_user (
     id serial primary key,
-    username character varying(254) NOT NULL,
+    email character varying(254) NOT NULL,
     first_name character varying(150) NOT NULL
 );
 

Diff for: backends/rapidpro/testdata.sql

@@ -1,5 +1,5 @@
 DELETE FROM users_user;
-INSERT INTO users_user("id", "username", "first_name") VALUES(1, 'system', 'System');
+INSERT INTO users_user("id", "email", "first_name") VALUES(1, 'system', 'System');
 
 /* Org with id 1 */
 DELETE FROM orgs_org;

Diff for: backends/rapidpro/user.go

@@ -12,7 +12,7 @@ type UserID int
 // gets the system user to use for contact audit fields
 func getSystemUserID(ctx context.Context, db *sqlx.DB) (UserID, error) {
 	var id UserID
-	err := db.GetContext(ctx, &id, "SELECT id FROM users_user WHERE username = 'system'")
+	err := db.GetContext(ctx, &id, "SELECT id FROM users_user WHERE email = 'system'")
 	if err != nil {
 		return 0, fmt.Errorf("error looking up system user: %w", err)
 	}