Don't call readPropsKeyFile in the constructor - if already have a key
Don't call readPropsKeyFile in the constructor; add generateKeyObjFromProps method; modify configureGtoken method to set this.keyObj from keyFile or keyFileContents
Don't call readPropsKeyFile in the constructor; add generateKeyObjFromProps method; modify configureGtoken method to set this.keyObj from keyFile or keyFileContents