fix(Snowflake Node): Fix key-pair credentials (#16635)

Co-authored-by: Elias Meire <elias@meire.dev>
Co-authored-by: cubic-dev-ai[bot] <191113872+cubic-dev-ai[bot]@users.noreply.github.com>

packages/nodes-base/credentials/Snowflake.credentials.ts

@@ -52,11 +52,6 @@ export class Snowflake implements ICredentialType {
 			name: 'username',
 			type: 'string',
 			default: '',
-			displayOptions: {
-				show: {
-					authentication: ['password'],
-				},
-			},
 		},
 		{
 			displayName: 'Password',
@@ -87,7 +82,19 @@ export class Snowflake implements ICredentialType {
 					authentication: ['keyPair'],
 				},
 			},
-			description: 'Private PEM key for Key-pair authentication with Snowflake',
+			description:
+				'Private PEM key for Key-pair authentication with Snowflake, follow guide <a href="https://docs.snowflake.com/en/user-guide/key-pair-auth" target="_blank">here</a>',
+		},
+		{
+			displayName: 'Passphrase',
+			name: 'passphrase',
+			type: 'string',
+			default: '',
+			description:
+				'If the private key is encrypted, you must provide the passphrase used to encrypt it',
+			typeOptions: {
+				password: true,
+			},
 		},
 		{
 			displayName: 'Schema',