You have triggered an unhandledRejection, you may have forgotten to catch a Promise rejection:
Error: Access denied for user 'dcisup'@'172.18.0.3' (using password: YES)
    at Packet.asError (/app/node_modules/mysql2/lib/packets/packet.js:740:17)
    at ClientHandshake.execute (/app/node_modules/mysql2/lib/commands/command.js:29:26)
    at PoolConnection.handlePacket (/app/node_modules/mysql2/lib/base/connection.js:475:34)
    at PacketParser.onPacket (/app/node_modules/mysql2/lib/base/connection.js:93:12)
    at PacketParser.executeStart (/app/node_modules/mysql2/lib/packet_parser.js:75:16)
    at Socket.<anonymous> (/app/node_modules/mysql2/lib/base/connection.js:100:25)
    at Socket.emit (node:events:524:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)