feat: always expose headers in method signature

Author: patrick-medusajs

src/templates/exportService.hbs

@@ -47,10 +47,16 @@ export class {{{name}}}{{{@root.postfix}}} {
 	 * @throws ApiError
 	 */
 	{{#if @root.exportClient}}
-	public {{{name}}}({{>parameters}}): CancelablePromise<{{>result}}> {
+	public {{{name}}}(
+		{{~>parameters~}},
+		customHeaders: Record<string, any> = {}
+	): CancelablePromise<{{>result}}> {
 		return this.httpRequest.request({
 	{{else}}
-	public static {{{name}}}({{>parameters}}): CancelablePromise<{{>result}}> {
+	public static {{{name}}}(
+		{{~>parameters~}},
+		customHeaders: Record<string, any> = {}
+	): CancelablePromise<{{>result}}> {
 		return __request(OpenAPI, {
 	{{/if}}
 			method: '{{{method}}}',
@@ -69,13 +75,7 @@ export class {{{name}}}{{{@root.postfix}}} {
 				{{/each}}
 			},
 			{{/if}}
-			{{#if parametersHeader}}
-			headers: {
-				{{#each parametersHeader}}
-				'{{{prop}}}': {{{name}}},
-				{{/each}}
-			},
-			{{/if}}
+			headers: customHeaders,
 			{{#if parametersQuery}}
 			query: {
 				{{#each parametersQuery}}

src/templates/partials/parameters.hbs

@@ -1,26 +1,23 @@
-{{#if parameters}}
-	{{#if parametersPath}}
+{{~#if parameters}}
+	{{~#if parametersPath}}
 
 		{{#each parametersPath}}
   			{{{name}}}{{>isRequired}}: {{>type}}{{#if default}} = {{{default}}}{{/if}}{{#unless @last}},
 			{{/unless}}
 		{{~/each}}
 	{{~/if}}
-	{{~#if parametersPath}}{{#unless parametersBody}}{{#unless parametersQuery}}
-	{{/unless}}{{/unless}}{{/if}}
 	{{~#if parametersBody}}
 		{{~#if parametersPath}},{{/if}}
 		{{#with parametersBody}}
 			{{{name}}}: {{>type}}
 		{{~/with}}
-		{{~#if parametersQuery}}, {{else}}
-		{{/if}}
+		{{~#if parametersQuery}},{{/if}}
 	{{~/if}}
 	{{~#if parametersQuery}}
 		{{~#if parametersPath}}{{#unless parametersBody}},{{/unless}}{{/if}}
 		{{#if codegen.queryParams}}
 			queryParams: {{codegen.queryParams}}
-		{{else}}
+		{{~else~}}
 			queryParams: {
 				{{#each parametersQuery}}
 					{{#ifdef description deprecated}}
@@ -36,6 +33,6 @@
 					{{{name}}}{{>isRequired}}: {{>type}},
 				{{/each}}
 			}
-		{{/if}}
-	{{/if}}
-{{/if}}
+		{{~/if}}
+	{{~/if}}
+{{~/if}}