Tarkista ennen käyttäjätunnuksen luomista, ettei käyttäjää jo ole
console.log:ista bongattua:
08-29 15:58:43.447 2559 2693 I ReactNativeJS: input is valid
08-29 15:58:43.620 2559 2693 I ReactNativeJS: { code: 'ER_DUP_ENTRY',
08-29 15:58:43.620 2559 2693 I ReactNativeJS: errno: 1062,
08-29 15:58:43.620 2559 2693 I ReactNativeJS: sqlMessage: 'Duplicate entry 'olljal@utu.fi' for key 'email'',
08-29 15:58:43.620 2559 2693 I ReactNativeJS: sqlState: '23000',
08-29 15:58:43.620 2559 2693 I ReactNativeJS: index: 0,
08-29 15:58:43.620 2559 2693 I ReactNativeJS: sql: 'INSERT INTO user VALUES (NULL, 'olljal@utu.fi', '$2b10
LH5PsqhPpnjz1yt.gmcHGekQhIqTWFwPbcfDtP4HktYQqaZ0wqm7y', NULL, NULL, 'en', NULL, NULL)' }