Fix errors

sge-backend/src/main/java/com/sgs/config/GraphQLScalarConfig.java

@@ -0,0 +1,15 @@
+package com.sgs.config;
+
+import com.sgs.graphql.scalar.EmissionSourceMapScalar;
+import graphql.schema.GraphQLScalarType;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class GraphQLScalarConfig {
+
+    @Bean
+    public GraphQLScalarType emissionSourceMapScalar() {
+        return EmissionSourceMapScalar.EmissionSourceMap;
+    }
+}