# Functions
GetPluginProviderFns returns the plugin's Retrieve and IsExpired functions returned by the plugin's credential provider getter.
GetPluginProviderFnsByName returns the plugin's Retrieve and IsExpired functions returned by the plugin's credential provider getter.
NewCredentials returns a new Credentials loader using the plugin provider.
# Constants
ErrCodeInvalidSymbolError symbol invalid.
ErrCodeLookupSymbolError failed to lookup symbol.
ErrCodePluginIsExpiredNil IsExpired Function was nil.
ErrCodePluginProviderRetrieve plugin provider's retrieve returned error.
ErrCodePluginRetrieveNil Retrieve function was nil.
ProviderName is the name this credentials provider will label any returned credentials Value with.
ProviderSymbolName the symbol name the SDK will use to lookup the plugin provider value from.