Add mailPassword table

This table stores email credentials for users using apps which use the
email addon

migrations/schema.sql

@@ -300,6 +300,16 @@ CREATE TABLE IF NOT EXISTS appPasswords(
     PRIMARY KEY (id)
 );
 
+CREATE TABLE IF NOT EXISTS mailPasswords(
+    appId VARCHAR(128) NOT NULL,
+    userId VARCHAR(128) NOT NULL,
+    password VARCHAR(1024) NOT NULL,
+    creationTime TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY(appId) REFERENCES apps(id),
+    FOREIGN KEY(userId) REFERENCES users(id),
+    PRIMARY KEY (appId, userId)
+);
+
 CREATE TABLE IF NOT EXISTS dockerRegistries(
     id VARCHAR(128) NOT NULL UNIQUE,
     provider VARCHAR(16) NOT NULL,