Messages Text displayName Null value

[hikmawanaz]

Halo saya sudah berhasil menjalankan apliaksi ini
tapi bot tidak mau merespon
setelah coba melakukan log pada variable messages , hasilnya banyak nilai null

berikut saya lampirkan hasil console.log(messages)

{ _from: 'ub503aac963134630e18956f749583d4a', displayName: null, picturePath: null, type: null, person: null, person2: null, personName: null, personName2: null, to: 'u36f614e42a85464b1067a6ec7575bb63', toType: 0, id: '7948910526755', createdTime: [Int64 value:1526180866102 octets:00 00 01 63 57 77 e8 36], deliveredTime: [Int64 value:0 octets:00 00 00 00 00 00 00 00], text: null, location: null, hasContent: false, contentType: 0, contentPreview: null, contentMetadata: { e2eeVersion: '1' }, sessionId: 0, chunks: [ 'u�m�BfH�', '�=�~YG���\u0017�T�]?�', '8\u000b\u0014\u0016:���v���g��\u0016', '\u0000\u0019\u0001�', '\u0000\u0017��' ], relatedMessageId: null, messageRelationType: null, readCount: null, relatedMessageServiceCode: null, ct: '1526180866148' }