create
Creates a non-native asset, automatically selecting AlphaNum4 or AlphaNum12 based on the asset code length.
Return
AssetTypeCreditAlphaNum4 or AssetTypeCreditAlphaNum12
Parameters
code
The asset code (1-12 characters)
issuer
The issuer's account ID (G... address)
Throws
if the code length is invalid or issuer is invalid