minor updates

Author: qingyang-hu

mongo/client.go

@@ -600,11 +600,11 @@ func (c *Client) newMongoCrypt(opts *options.AutoEncryptionOptions) (*mongocrypt
 
 	providers := make(map[string]credentials.Provider)
 	for k, fn := range opts.CredentialProviders {
-		if k == "aws" && fn != nil {
+		if provider := fn; k == "aws" && provider != nil {
 			providers[k] = &credproviders.AwsProvider{
 				Provider: func(ctx context.Context) (aws.Credentials, error) {
 					var creds aws.Credentials
-					c, err := fn(ctx)
+					c, err := provider(ctx)
 					if err != nil {
 						return creds, err
 					}

mongo/client_encryption.go

@@ -58,11 +58,11 @@ func NewClientEncryption(keyVaultClient *Client, opts ...options.Lister[options.
 
 	providers := make(map[string]credentials.Provider)
 	for k, fn := range cea.CredentialProviders {
-		if k == "aws" && fn != nil {
+		if provider := fn; k == "aws" && provider != nil {
 			providers[k] = &credproviders.AwsProvider{
 				Provider: func(ctx context.Context) (aws.Credentials, error) {
 					var creds aws.Credentials
-					c, err := fn(ctx)
+					c, err := provider(ctx)
 					if err != nil {
 						return creds, err
 					}