Possibility to pass location of the config and credentials file

[ahochsteger]

Currently the location of the config and credentials file is hard-coded to certain locations - see:

openapi-cli-generator/cli/credentials.go

Line 228 in 5c2358b

Creds.AddConfigPath("$HOME/." + viper.GetString("app-name") + "/")

openapi-cli-generator/cli/cli.go

Line 159 in 5c2358b

viper.AddConfigPath("/etc/" + appName + "/")

This would allow to use dynamically created config and credentials files to prevent race conditions, if the CLI is used in parallel for different situations.