➜  Bitcoin bcnetwork main
➜  Bitcoin which bc
bc: aliased to /Users/me/bitcoin/builds/master/src/bitcoin-cli -chain=main
➜  Bitcoin bc createwallet testwallet
{
  "name": "testwallet",
  "warning": ""
}
➜  Bitcoin bc getnewaddress
bc1q27kxl4m5z6xlcd24l4jv8c8y0w2g8dppxdyl9a
➜  Bitcoin bcnetwork signet
➜  Bitcoin bc createwallet testwallet
error code: -4
error message:
Wallet file verification failed. Failed to create database path '/Users/me/Library/Application Support/Bitcoin/signet/wallets/testwallet'. Database already exists.
➜  Bitcoin bc getnewaddress
error code: -19
error message:
Wallet file not specified (must request wallet RPC through /wallet/<filename> uri-path).
Try adding "-rpcwallet=<filename>" option to bitcoin-cli command line.