Added swagger documentation for User and investment service

Author: pratikb0501

investmentservice/src/main/java/OpenApiConfig.java

@@ -0,0 +1,16 @@
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.info.Info;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class OpenApiConfig {
+    @Bean
+    public OpenAPI customOpenAPI() {
+        return new OpenAPI()
+                .info(new Info()
+                        .title("Investment Service API")
+                        .version("1.0")
+                        .description("Documentation for the Investment Service API"));
+    }
+}

userservice/src/main/java/OpenApiConfig.java

@@ -0,0 +1,16 @@
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.info.Info;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class OpenApiConfig {
+    @Bean
+    public OpenAPI customOpenAPI() {
+        return new OpenAPI()
+                .info(new Info()
+                        .title("User Service API")
+                        .version("1.0")
+                        .description("Documentation for the User Service API"));
+    }
+}